Node.js server.js文件中的Cors代理问题(react、express、sql)
我用mssql和express制作了一个基本的fullstack网站。最初,get路由工作,但在实现post路由后,它们已停止 我相信我收到了一个cors错误,这是错误的Node.js server.js文件中的Cors代理问题(react、express、sql),node.js,sql-server,reactjs,express,cors,Node.js,Sql Server,Reactjs,Express,Cors,我用mssql和express制作了一个基本的fullstack网站。最初,get路由工作,但在实现post路由后,它们已停止 我相信我收到了一个cors错误,这是错误的 Proxy error: Could not proxy request /admin-view-users from localhost:3000 to http://localhost:5000/. [1] See https://nodejs.org/api/errors.html#errors_common_syste
Proxy error: Could not proxy request /admin-view-users from localhost:3000 to http://localhost:5000/.
[1] See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (ECONNREFUSED).
myserver.js
const express = require("express");
const sql = require("mssql");
var cors = require("cors");
const path = require("path");
var bodyParser = require("body-parser");
const port = process.env.PORT || 5000;
const app = express();
app.use(cors());
app.use(express.json());
const config = {
user: "sas",
password: "Mypassword456",
server: "DEVSQL_2014", // You can use 'localhost\\instance' to connect to named instance
database: "TestDBWebsite"
};
//AdminView users just pulls the users from the database
app.get("/admin-view-users", cors(), function(req, res) {
// connect to your database
sql.connect(config, function(err) {
if (err) console.log(err);
// create Request object
var request = new sql.Request();
// query to the database and get the records
request.query("select * from Users2 ", function(err, recordset) {
if (err) console.log(err);
// send records as a response
res.json(recordset);
res.end();
});
});
});
app.get("/admin-view-users", function(req, res) {
// connect to your database
sql.connect(config, function(err) {
if (err) console.log(err);
// create Request object
var request = new sql.Request();
// query to the database and get the records
request.query("select * from Users2 ", function(err, recordset) {
if (err) console.log(err);
// send records as a response
res.json(recordset);
res.end();
});
});
});
app.get("/user-questions", function(req, res) {
// connect to your database
sql.connect(config, function(err) {
if (err) console.log(err);
// create Request object
var request = new sql.Request();
// query to the database and get the records
request.query("select * from Questions ", function(err, recordset) {
if (err) console.log(err);
// send records as a response
res.json(recordset);
});
});
});
//
var jsonParser = bodyParser.json();
app.use(express.bodyParser());
app.post("/admin-Add-Users", jsonParser, function(request, response) {
var email = req.body.email;
var password = req.body.password;
var request = new sql.Request();
// query to the database and get the records
console.log(email, password); // your JSON
// echo the result back
console.log(request.body);
request.query(
"insert into Login (email, password) values ('" +
email +
"','" +
password +
"')",
function(err, recordset) {
if (err) console.log(err);
}
);
response.send({ message: "Success" });
});
app.listen(port, () => `Server running on port ${port}`);
我已经包括了“app.use(cors());”,我认为它可以解决这个问题,但它没有
如果可以的话,请给出建议。我想到的第一件事是双重使用CORS 您将它放到中间件堆栈中,然后在此处再次调用它:
app.get("/admin-view-users", cors(), function(req, res) {
请仅尝试使用一次: